# Peculiar AGNs from the INTEGRAL and RXTE data

## TL;DR

This study investigates the X-ray spectral properties of AGNs, testing the spin-paradigm model, and identifies peculiar AGNs that challenge current theoretical predictions using RXTE and INTEGRAL data.

## Contribution

It provides a comprehensive analysis of AGN X-ray spectra, confirming the spin-paradigm for most radio-quiet AGNs and identifying peculiar cases that contradict the model.

## Key findings

- Most radio-quiet AGNs have high-energy cut-offs above 100 keV.
- Approximately 25% of radio-loud AGNs show cut-offs above 150 keV.
- A sample of 79 peculiar AGNs was compiled for further study.

## Abstract

We analysed how the active galactic nucleus (AGN) X-ray primary continuum depends on AGN activity in radio, using the data of RXTE Spectral & Timing Database (Rossi X-ray Timing Explorer) and INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory). Our aim is to test the relation between spectral shapes of these AGNs and the prediction of the "spin-paradigm" model of the AGN "central engine". We have found that for the major part of radio-quiet (RQ) AGNs the value of high-energy exponential cut-off in primary spectrum appears to be significantly higher than 100 keV and thus follows the "spin-paradigm" predictions. In the same time, near 25% of radio-loud (RL) AGNs demonstrate the high-energy cut-off at the energies above 150 keV, contradicting the "spin paradigm". We have composed a sample of "peculiar" 69 RQ and 10 RL AGNs that seem to contradict to the "spin paradigm" for further individual studies of these objects.

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Source: https://tomesphere.com/paper/1706.03253